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Author |
Warneken, F.; Tomasello, M. |
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Title |
Altruistic Helping in Human Infants and Young Chimpanzees |
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Journal Article |
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2006 |
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Science |
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311 |
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5765 |
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1301-1303 |
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Human beings routinely help others to achieve their goals, even when the helper receives no immediate benefit and the person helped is a stranger. Such altruistic behaviors (toward non-kin) are extremely rare evolutionarily, with some theorists even proposing that they are uniquely human. Here we show that human children as young as 18 months of age (prelinguistic or just-linguistic) quite readily help others to achieve their goals in a variety of different situations. This requires both an understanding of others' goals and an altruistic motivation to help. In addition, we demonstrate similar though less robust skills and motivations in three young chimpanzees. |
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Equine Behaviour @ team @ |
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5607 |
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Author |
Warneken, F.; Tomasello, M. |
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Title |
Varieties of altruism in children and chimpanzees |
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Year |
2009 |
Publication |
Trends in cognitive sciences |
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Trends Cogn Sci |
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13 |
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9 |
Pages |
397-402 |
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Recent empirical research has shed new light on the perennial question of human altruism. A number of recent studies suggest that from very early in ontogeny young children have a biological predisposition to help others achieve their goals, to share resources with others and to inform others of things helpfully. Humans nearest primate relatives, such as chimpanzees, engage in some but not all of these behaviors: they help others instrumentally, but they are not so inclined to share resources altruistically and they do not inform others of things helpfully. The evolutionary roots of human altruism thus appear to be much more complex than previously supposed. |
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Elsevier Science, |
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1364-6613 |
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Equine Behaviour @ team @ S1364-6613(09)00149-1 DOI - 10.1016/j.tics.2009.06.008 |
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5608 |
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Author |
Warneken, F.; Hare, B.; Melis, A.P.; Hanus, D.; Tomasello, M. |
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Title |
Spontaneous Altruism by Chimpanzees and Young Children |
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Journal Article |
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2007 |
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PLoS Biol |
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PLoS Biol |
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5 |
Issue |
7 |
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e184 EP - |
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<p>Experimental evidence reveals that chimpanzees will help other unrelated humans and conspecifics without a reward, showing that they share crucial aspects of altruism with humans.</p> |
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Public Library of Science |
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Equine Behaviour @ team @ |
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5609 |
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Author |
Tomasello, M.; Call,J |
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Title |
Primate Cognition |
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1997 |
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Oxford University Press |
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Oxf. Univ. Pr. |
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Description
Ever since Charles Darwin first formulated his theories on evolution, much research has been conducted in primate cognition. In this book, Michael Tomasello and Josep Call review what is already known about the cognitive skills of nonhuman primates, and assess the current state of our knowledge. They integrate empirical findings on the topic from the beginning of the century to the present, placing this work in theoretical perspective. The first part examines the way primates adapt to their physical world, mostly for the purpose of foraging. The second part lokos at primate social knowledhe and focuses on the adaptations of primates to their social world for purposes of competation and cooperation. In the third section, the authors construct a general theory of primate cognition, distinguishing the cognition in primates from that of other mammals (human in particular). Their broad-ranging theory should provide a guide for future research. Primate Cognition is an enlightening exploration of the cognitive capacities of our nearest primate relatives. It is a useful resource for a eide range of researchers and students in psychology, behavioral biology, primatology, and anthropology. |
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Oxford University Press |
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Oxford |
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9780195106244 |
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Equine Behaviour @ team @ |
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4424 |
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Author |
Tomasello, M.; Hare, B.; Fogleman, T. |
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Title |
The ontogeny of gaze following in chimpanzees, Pan troglodytes, and rhesus macaques, Macaca mulatta |
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Journal Article |
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2001 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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61 |
Issue |
2 |
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335-343 |
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Primates follow the gaze direction of conspecifics to outside objects. We followed the ontogeny of this social-cognitive skill for two species: rhesus macaques and chimpanzees. In the first two experiments, using both a cross-sectional and a longitudinal design, we exposed individuals of different ages to a human looking in a specified direction. Rhesus infants first began reliably to follow the direction of this gaze at the end of the early infancy period, at about 5.5 months of age. Chimpanzees did not reliably follow human gaze until 3-4 years; this corresponds to the latter part of the late infancy period for this species. In the third experiment we exposed individuals of the same two species to a human repeatedly looking to the same location (with no special object at that location) to see if subjects would learn to ignore the looks. Only adults of the two species diminished their gaze-following behaviour over trials. This suggests that in the period between infancy and adulthood individuals of both species come to integrate their gaze-following skills with their more general social-cognitive knowledge about other animate beings and their behaviour, and so become able to deploy their gaze-following skills in a more flexible manner. |
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no |
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refbase @ user @ |
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596 |
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Author |
Tomasello, M.; Hare, B.; Agnetta, B. |
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Title |
Chimpanzees, Pan troglodytes, follow gaze direction geometrically |
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Journal Article |
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Year |
1999 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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58 |
Issue |
4 |
Pages |
769-777 |
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Two experiments on chimpanzee gaze following are reported. In the first, chimpanzee subjects watched as a human experimenter looked around various types of barriers. The subjects looked around each of the barriers more when the human had done so than in a control condition (in which the human looked in another direction). In the second experiment, chimpanzees watched as a human looked towards the back of their cage. As they turned to follow the human's gaze a distractor object was presented. The chimpanzees looked at the distractor while still following the human's gaze to the back of the cage. These two experiments effectively disconfirm the low-level model of chimpanzee gaze following in which it is claimed that upon seeing another animate being's gaze direction chimpanzees simply turn in that direction and look around for something interesting. Rather, they support the hypothesis that chimpanzees follow the gaze direction of other animate beings geometrically to specific locations, in much the same way as human infants. The degree to which chimpanzees have a mentalistic interpretation of the gaze and/or visual experience of others is still an open question. |
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refbase @ user @ |
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587 |
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Author |
Tomasello, M.; Davis-Dasilva, M.; Camak, L.; Bard, K. |
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Title |
Observational learning of tool-use by young chimpanzees |
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Journal Article |
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Year |
1987 |
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Human Evolution |
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2 |
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2 |
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175-183 |
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Chimpanzees; Observational Learning; Tool-Use |
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In the current study two groups of young chimpanzees (4–6 and 8–9 years old) were given a T-bar and a food item that could only be reached by using the T-bar. Experimental subjects were given the opportunity to observe an adult using the stick as a tool to obtain the food; control subjects were exposed to the adult but were given no demonstration. Subjects in the older group did not learn to use the tool. Subjects in the younger group who were exposed to the demonstrator learned to use the stick as a tool much more readily than those who were not. None of the subjects demonstrated an ability to imitatively copy the demonstrator's precise behavioral strategies. More than simple stimulus enhancement was involved, however, since both groups manipulated the T-bar, but only experimental subjects used it in its function as a tool. Our findings complement naturalistic observations in suggesting that chimpanzee tool-use is in some sense «culturally transmitted» — though perhaps not in the same sense as social-conventional behaviors for which precise copying of conspecifics is crucial. |
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Kluwer Academic Publishers |
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0393-9375 |
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Equine Behaviour @ team @ |
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5915 |
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Author |
Tomasello, M.; Call, J.; Hare, B. |
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Five primate species follow the visual gaze of conspecifics |
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Journal Article |
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Year |
1998 |
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Animal Behaviour. |
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Anim. Behav. |
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55 |
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4 |
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1063-1069 |
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Individuals from five primate species were tested experimentally for their ability to follow the visual gaze of conspecifics to an outside object. Subjects were from captive social groups of chimpanzees,Pan troglodytes, sooty mangabeys,Cercocebus atys torquatus, rhesus macaques,Macaca mulatta, stumptail macaques,M. arctoides, and pigtail macaques,M. nemestrina. Experimental trials consisted of an experimenter inducing one individual to look at food being displayed, and then observing the reaction of another individual (the subject) that was looking at that individual (not the food). Control trials consisted of an experimenter displaying the food in an identical manner when the subject was alone. Individuals from all species reliably followed the gaze of conspecifics, looking to the food about 80% of the time in experimental trials, compared with about 20% of the time in control trials. Results are discussed in terms of both the proximate mechanisms that might be involved and the adaptive functions that might be served by gaze-following. |
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refbase @ user @ |
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592 |
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Author |
Tomasello, M.; Call, J. |
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Title |
The role of humans in the cognitive development of apes revisited |
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Journal Article |
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2004 |
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Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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7 |
Issue |
4 |
Pages |
213-215 |
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Animals; *Behavior, Animal; *Cognition; Culture; Hominidae/*psychology; Humans; *Imitative Behavior; Imprinting (Psychology); *Intention; Social Behavior; *Social Environment; Species Specificity |
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Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany. tomas@eva.mpg.de |
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1435-9448 |
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PMID:15278733 |
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Equine Behaviour @ team @ |
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2517 |
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Tomasello, M.; Call, J |
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Books Received |
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Journal Article |
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2001 |
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Animal Behaviour |
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61 |
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1 |
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269-270 |
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The Alex Studies: Cognitive and Communicative Abilities of Grey
Parrots. By I. M. PEPPERBERG. Cambridge, Massachusetts:
Harvard University Press (1999). |
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Equine Behaviour @ team @ |
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5446 |
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